diff --git a/koans.tm b/koans.tm
index a52e014..cb9e52e 100644
--- a/koans.tm
+++ b/koans.tm
@@ -8,6 +8,14 @@ use commands
 
 editor := "vim"
 
+LESSONS := [
+    Lesson((./lessons/lesson-01-hello-world.tm), "Hello World", "Hello world$\n"),
+    Lesson((./lessons/lesson-02-tests.tm), "Testing Code"),
+    Lesson((./lessons/lesson-03-variables.tm), "Variables"),
+    Lesson((./lessons/lesson-04-functions.tm), "Functions"),
+    Lesson((./lessons/lesson-05-basic-types.tm), "Basic Types"),
+]
+
 enum TestResult(Success(output:Text), Error(err:Text), WrongOutput(actual:Text, expected:Text)):
     func print(result:TestResult):
         when result is Success(s):
@@ -46,13 +54,6 @@ struct Lesson(file:Path, description:Text, expected_output=none:Text):
 
         return Success(output)
 
-LESSONS := [
-    Lesson((./lessons/lesson-01-hello-world.tm), "Hello World", "Hello world$\n"),
-    Lesson((./lessons/lesson-02-tests.tm), "Testing Code"),
-    Lesson((./lessons/lesson-03-variables.tm), "Variables"),
-    Lesson((./lessons/lesson-04-functions.tm), "Functions"),
-]
-
 func ask_continue():
     _ := ask("$\033[2mPress Enter to continue...$\033[m", bold=no)
 
diff --git a/lesson-templates/lesson-05-basic-types.tm b/lesson-templates/lesson-05-basic-types.tm
new file mode 100644
index 0000000..27609e7
--- /dev/null
+++ b/lesson-templates/lesson-05-basic-types.tm
@@ -0,0 +1,33 @@
+# Basic Types
+
+func main():
+
+    # Tomo has several built-in types, including:
+    # - Int (integer numbers)
+    # - Num (floating-point numbers)
+    # - Text (string values)
+    # - Bool (true or false)
+
+    # Fix these variables so they match the expected values:
+    
+    a := 42
+    b := 3.14
+    c := "Tomo"
+    # Boolean values use `yes`/`no`, not `true`/`false`
+    d := yes
+
+    >> a
+    = 99
+    >> b
+    = 2.718
+    >> c
+    = "Hello, world!"
+    >> d
+    = no
+
+    # Text values support interpolation using `$`:
+    name := "Alice"
+    greeting := "Hello, $name!"
+
+    >> greeting
+    = "Hello, Bob!"